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The DBA 4000 Series plain rotor for 2017–2018 Ford Focus RS rear applications is a direct-replacement rotor cast from XG-150 high-carbon alloy iron with Thermal Stability Profiling. Its Kangaroo Paw ventilation uses 144 patterned pillars to expand contact surface and cooling efficiency, helping provide up to 30% more surface area and roughly 20% improved cooling compared with straight vanes. The HD finish retains a smooth OE-style look for restrained aesthetics.
DBA 17-18 Ford Focus RS Rear 4000 Series Plain Rotor
